Are there any special drivers or software to install?

LineLink is a plug-and-play device, so there are no drivers to install. The first time you connect it to your computer, it will automatically install all the necessary drivers and be ready to use immediately.

You can use LineLink with any kind of recording software that supports USB audio devices.

In Windows Vista, go to Start Menu > Settings > Control Panel > Sound (or select "Switch to Classic View" if you don't see "Sound" as an option). Click on the "Recording" tab and select "Microphone – C-Media USB Audio Device" as the default device. Click "OK."
For Macs, go to your "System Preferences," then click "Sound." Click the "Input" tab and select "C-Media USB Audio Device" as the input device. Close the Control Panel.

ASIO4All - Optional ASIO Driver for Windows [v2.10]
This Alesis audio interface is a plug-and-play device, which means that no additional drivers need to be installed to use it with your computer. If you use ASIO compatible audio software on your Windows PC, this optional ASIO driver can be used to offer additional configuration options such as latency and buffer adjustments.